A=(x+3)x(7)

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Solution for A=(x+3)x(7) equation: 


Simplifying
A = (x + 3) * x(7)

Reorder the terms:
A = (3 + x) * x(7)

Reorder the terms for easier multiplication:
A = 7x(3 + x)
A = (3 * 7x + x * 7x)
A = (21x + 7x2)

Solving
A = 21x + 7x2

Solving for variable 'A'.

Move all terms containing A to the left, all other terms to the right.

Simplifying
A = 21x + 7x2

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